|
public static TryParse ( Byte frameStart, |
||
| frameStart | Byte | |
| offset | ||
| headerLength | ||
| keySegment | ArraySegment |
|
| header | ||
| return | System.Boolean | |
private void ParseHeader(Int32 readed)
{
if (!TryReadHeaderUntil(ref readed, 6))
{
Close(WebSocketCloseReasons.ProtocolError);
return;
}
Int32 headerlength = WebSocketFrameHeader.GetHeaderLength(_headerBuffer.Array, _headerBuffer.Offset);
if (!TryReadHeaderUntil(ref readed, headerlength))
{
Close(WebSocketCloseReasons.ProtocolError);
return;
}
WebSocketFrameHeader header;
if (!WebSocketFrameHeader.TryParse(_headerBuffer.Array, _headerBuffer.Offset, headerlength, _keyBuffer, out header))
{
throw new WebSocketException("Cannot understand frame header");
}
CurrentHeader = header;
if (!header.Flags.Option.IsData())
{
ProcessControlFrame(_clientStream);
CurrentHeader = null;
}
else
{
_ongoingMessageAwaiting = 0;
}
}
private async Task ReadHeader(CancellationToken cancellation)
{
Int32 readed = 0;
var success = await TryReadHeaderUntil(readed, 6, cancellation).ConfigureAwait(false);
if (!success)
{
Close(WebSocketCloseReasons.ProtocolError);
return;
}
readed += 6;
Int32 headerlength = WebSocketFrameHeader.GetHeaderLength(_headerBuffer.Array, _headerBuffer.Offset);
success = await TryReadHeaderUntil(readed, headerlength, cancellation).ConfigureAwait(false);
if (!success)
{
Close(WebSocketCloseReasons.ProtocolError);
return;
}
WebSocketFrameHeader header;
if (!WebSocketFrameHeader.TryParse(_headerBuffer.Array, _headerBuffer.Offset, headerlength, _keyBuffer, out header))
{
throw new WebSocketException("Cannot understand frame header");
}
CurrentHeader = header;
if (!header.Flags.Option.IsData())
{
ProcessControlFrame(_clientStream);
CurrentHeader = null;
}
else
{
_ongoingMessageAwaiting = 0;
}
_ping.NotifyActivity();
}
private void ProcessHeaderFrame(int headerlength)
{
if (!WebSocketFrameHeader.TryParse(_headerBuffer.Array, _headerBuffer.Offset, headerlength, _keyBuffer, out WebSocketFrameHeader header))
{
throw new WebSocketException("Cannot understand frame header");
}
CurrentHeader = header;
if (!header.Flags.Option.IsData())
{
ProcessControlFrame();
CurrentHeader = null;
}
else
{
_ongoingMessageAwaiting = 0;
}
_ping.NotifyActivity();
}
private async Task ParseHeaderAsync(int read)
{
if (read < 2)
{
if (this.log.IsWarningEnabled)
{
this.log.Warning($"{nameof(this.ParseHeaderAsync)} is called with only {read} bytes buffer. Minimal is 2 bytes.");
}
await this.CloseAsync(WebSocketCloseReasons.ProtocolError).ConfigureAwait(false);
return;
}
var headerLength = WebSocketFrameHeader.GetHeaderLength(this.headerBuffer.Array, this.headerBuffer.Offset);
if (read != headerLength)
{
if (this.log.IsWarningEnabled)
{
this.log.Warning($"{nameof(this.ParseHeaderAsync)} is called with {read} bytes buffer. While whole header is {headerLength} bytes length.");
}
await this.CloseAsync(WebSocketCloseReasons.ProtocolError).ConfigureAwait(false);
return;
}
WebSocketFrameHeader header;
if (!WebSocketFrameHeader.TryParse(this.headerBuffer.Array, this.headerBuffer.Offset, headerLength, out header))
{
throw new WebSocketException("Frame header is malformed.");
}
if (this.log.IsDebugEnabled)
{
this.log.Debug($"({this.GetHashCode():X}) [FRAME<-] {header}");
}
this.CurrentHeader = header;
if (!header.Flags.Option.IsData())
{
await this.ProcessControlFrameAsync().ConfigureAwait(false);
this.CurrentHeader = null;
}
else
{
this.ongoingMessageAwaiting = 0;
}
try
{
this.pingHandler.NotifyActivity();
}
catch (Exception notifyPingError)
{
if (this.log.IsWarningEnabled)
{
this.log.Warning($"({this.GetHashCode():X}) An error occurred while trying to call {this.pingHandler.GetType().Name}.{nameof(this.pingHandler.NotifyActivity)}() method.", notifyPingError);
}
}
}
